Structure Member Names
Structure member names are specified in the same way as variable names.
Store UTF-8 character codes in the ANSI extended symbol segment.
Array Indices
Specify the array index in a logical segment that is set as a member ID.
Y
ou can specify an array index ([x]) in a variable name.
(Specification Method 1: 8-bit Index)
BYTE 28 hex L
ogical Segment (Member ID)
USINT Index Array index from 0 to 255
(Specification Method 2: 16-bit Index)
BYTE 29 hex L
ogical Segment (Member ID)
octet 00 hex Pad
UINT Index (L) Array index from 0 to 65,535
(H)
Range Specifications with the Num of Element Field
There is a Num of Element field in the request data for the variable read and variable write services.
Y
ou can use these services to access the specified range of an array with the following specifications.
• Specify the first element in the range of elements to access in the array variable as the variable to
read or write.
• Specify the number of elements to access in the Num of Element field.
Specification Examples
This example shows how to specify VarAA.MemB[1.2] for the following structure variable.
struct
{
UINT MemA;
BOOL MemB[10][10];
} VarAA;
V
ariable Name Specification Format
8 CIP Message Communications
8-44
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
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